单项选择题

The award was contested by one of the______.

A． competitors
B． competition
C． competing
D． competitive
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单项选择题
Everyone was disappointed to hear that ______the company's proposal was
A． turned up
B． turned on
C． turned away
D． turned down
单项选择题
They ______ the launch of their new company only a year ago.
A． announce
B． are announcing
C． have announced
D． announced
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